Located outside of Little Rock, Washington is a prairie of natural dome-like hills called Mima mounds. The origin of these mounds is still a bit of a mystery. Some speculate large gophers created these hills, others think they were formed from wind blown sentiments. Mima mounds are found in various states west of the Mississippi River.
The Mima Mounds Natural Area in Thurston County is a Natural National Landmark. The 445 acre preserve includes a .5 mile long paved ADA accessible trail along with a 1.5 mile gravel loop. The grassy mounds are covered with wildflowers throughout the spring and early summer. You will need a Discover Pass to park there.